gistfile1.java

@GenericConfiguration
@Retention(RUNTIME) 
@Target( { TYPE, METHOD, PARAMETER, FIELD })
public @interface Service {}

@Produces
@Service @S3
public BlobStoreContext getS3BlobStoreContext(BlobStoreContextFactory factory) {
   return factory.openContext(...);
}

@Generic(Service.class)
public class BlobStoreContextManager {

   @ApplyQualifiers @Produces
   public BlobStore getBlobStore(@ApplyQualifiers BlobStoreContext context) {
      return context.getBlobStore();
   }
   
}